Mainly through trade on the Silk Road was it that Middle Persian words for exotic commodities were loaned into Chinese. Oddly, these loanwords are typically themselves loans from a pre-Iranian substrate, e.g. Elamite or BMAC:[1][2][3]

The Chinese explorer Zhang Qian, who visited the neighbouring countries of Bactria and Sogdiana in 126 BCE, made the first known Chinese report on Parthia. In his accounts Parthia is named "Ānxī" (Chinese: 安息), a transliteration of "Arsacid", the name of the Parthian dynasty. Zhang Qian clearly identifies Parthia as an advanced urban civilization, which he equates to those of Dayuan (in Ferghana) and Daxia (in Bactria).

"Anxi is situated several thousand li west of the region of the Great Yuezhi (in Transoxonia). The people are settled on the land, cultivating the fields and growing rice and wheat. They also make wine out of grapes. They have walled cities like the people of Dayuan (Ferghana), the region contains several hundred cities of various sizes. The coins of the country are made of silver and bear the face of the king. When the king dies, the currency is immediately changed and new coins issued with the face of his successor. The people keep records by writing on horizontal strips of leather. To the west lies Tiaozi (Mesopotamia) and to the north Yancai and Lixuan (Hyrcania)." (Shiji, 123, Zhang Qian quote, trans. Burton Watson).

Following Zhang Qian's embassy and report, commercial relations between China, Central Asia, and Parthia flourished, as many Chinese missions were sent throughout the 1st century BCE: "The largest of these embassies to foreign states numbered several hundred persons, while even the smaller parties included over 100 members… In the course of one year anywhere from five to six to over ten parties would be sent out." (Shiji, trans. Burton Watson).

The Parthians were apparently very intent on maintaining good relations with China and also sent their own embassies, starting around 110 BC: "When the Han envoy first visited the kingdom of Anxi (Parthia), the king of Anxi dispatched a party of 20,000 horsemen to meet them on the eastern border of the kingdom… When the Han envoys set out again to return to China, the king of Anxi dispatched envoys of his own to accompany them… The emperor was delighted at this." (Shiji, 123, trans. Burton Watson).

Like their predecessors the Parthians, the Sasanian Empire maintained active foreign relations with China, and ambassadors from Persia frequently travelled to China. Chinese documents record thirteen Sasanian embassies to China. Commercially, land and sea trade with China was important to both the Sasanian and Chinese Empires. Large numbers of Sasanian coins have been found in southern China, confirming maritime trade.

On various occasions, Sasanian kings sent their most talented Persian musicians and dancers to the Chinese imperial court. Both empires benefited from trade along the Silk Road, and shared a common interest in preserving and protecting that trade. They cooperated in guarding the trade routes through central Asia, and both built outposts in border areas to keep caravans safe from nomadic tribes and bandits.

During the Liang Dynasty in China, in 547 a Persian embassy paid tribute to the Liang, amber was recorded as originating from Persia by the Liang Shu (Book of Liang).[4]

There are records of several joint Sasanian and Chinese efforts against their common Hephtalite enemy. Following encroachments by the nomadic Turkic on states in Central Asia, an apparent collaboration between Chinese and Sasanian forces repelled the Turkic advances. Documents from Mount Mogh also note the presence of a Chinese general in the service of the king of Sogdiana at the time of the Arab invasion.

Following the invasion of Iran by Muslim Arabs, Peroz III, the son of Yazdegerd III, escaped, along with a few Persian nobles and took refuge in the Chinese imperial court.[5]
Both Peroz and his son Narsieh (Chinese neh-shie) were given high titles at the Chinese court.[5]
At least on two occasions, the last possibly in 670, Chinese troops were sent with Peroz to restore him to the Sasanian throne, with mixed results. One possibly ended up in a short rule of Peroz in Sistan (Sakestan) from which a little numismatic evidence remains. Narsieh later attained the position of commander of the Chinese imperial guards and his descendants lived in China as respected princes.[5]

A large number of Central Asian and Persian soldiers, experts, and artisans were recruited by the MongolYuan Dynasty of China. Some of them, known as semu ("assorted officials") occupied important official posts in the Yuan state administration.[6] One of the most famous settlers from Persia was Sayyid Ajjal Shams al-Din Omar, who is identified as an ancestor of many Chinese Hui lineages and that of Yunnan's Panthay Hui population. His most famous descendant was Zheng He,[citation needed] who became the Ming dynasty's most famous explorer.

Relations continued during the Ming dynasty.

The famous Maragheh observatory in Maragheh, Iran, is also known to have had some Chinese astronomers working there alongside Iranian astronomers, and some Iranian astronomical instruments were also being used by astronomers in China.[7]SafavidIranian art was also partly influenced by Chinese art to an extent. Shah Abbas had hundreds of Chinese artisans in his capital Esfahan. Also, 300 Chinese potters produced glazed tile buildings, and hundreds of others produced metalwork, miniature paintings, calligraphy, glasswork, tile work, and pottery.[8][9] From E. Sykes's "Persia and Its People": "Early in the seventeenth century, Shah Abbas imported Chinese workmen into his country to teach his subjects the art of making porcelain, and the Chinese influence is very strong in the designs on this ware. Chinese marks are also copied, so that to scratch an article is sometimes the only means of proving it to be of Persian manufacture, for the Chinese glaze, hard as iron, will take no mark."[10][11]

^Pearce, Francis Barrow (1920). Zanzibar the island metropolis of eastern Africa. Great Britain: Dutton. p. 359. Retrieved 12 March 2012. Interest to quote the following extract from E. Sykes's Persia and Its People: "Early in the seventeenth century, Shah Abbas imported Chinese workmen into his country to teach his subjects the art of making porcelain, and the Chinese influence is very strong in the designs on this ware. Chinese marks are also copied, so that to scratch an article is sometimes the only means of proving it to be of Persian manufacture, for the Chinese glaze, hard as iron, will take no mark."